Roller-skate.



PAUL GEORG PILZ, OF SOHLETTAU, ERZGEBIRGE, GERMANY.

ROLLE R-SKATE Specification of Letters Patent.

Patented Aug. 27, 19o 7.

Application filed December 21,1905. Serial No. 292,879.

To all whom 'it may concern:

' Be it known that I, PAUL GEORG Pinz, a citizen of the German Empire, and a resident of Schlettau, Erzgeb., Germany, (whose post-office address is Schlettau, Erzgeb.`,) have invented certain new and useful Improvements in Roller-Skates,` of which the following is a specification.

The present invention relates to improvements in socalled roller or parlor skates. In prior skates of this description the rollers are always so mounted as to admit of rotation in both directions. Such free motion of the rollers, however, greatly increases the difficulties oi learning to skate, and the skater, moreover, is not in a position to employ the force of the push of the'one ioot to limit the rotation of the rollers oi the other skate.

In my improved skate the rollers can only turn in one direction. In this manner the skater is enabled to execute exactly the same movements as can be executed with ice-skates. For this purpose an arrestingdevice is provided in each oi the rollers, which permits oi free running oi the rollers in the direction of propulsion, but prevents such motion in the contraryfdirection. The skater is thus enabled at every stage of his progress, by

' pushing the one foot backward to stop the rotarymotion of the rollers, and at the same time to increase the speed of rotation oi the rollers of the other skate.

One form of construction of the new skate is shown in the accompanying drawing, in which Figure l is a longitudinal sectional view, Fig. 2 an underside sectional view, Fig. 3 a fragmental vertical section, drawn to a larger scale, showing one of the rollers in elevation with hub cover removed. Fig. 4 is a cross section through Fig. 3. Fig. 5 is a iront elevation of an axle-bush. Fig. 6 is an inside view of the hubcover of the roller. Fig. 6a is a section throughFig. 6. Fig. 7 is a cross section of a roller Iwith cover removed.

a is the sole-plate of the skate, below which are the hangers b, in which are mounted the xed roller-axles c. The latter are flattened at each end (Fig. 4) and inserted in the correspondingly shaped holes of the rectangular bushes d (Fig. 5), which iit into the hangers b, so that the axles cannot turn. On the axle o there is rotatably mounted the actual roller e, whichy consists oi a ielly-ring f closed at one side. Over this telly-ring the tire g of rubber or other suitable material is iitted. The open side of the wheel-body e is closed by a cover h (Figs. 4, 6, 6) `loosely rotatable on the axle c and having lugs i, which engage with correspondingly shaped projections k on the interior oi the wheel-body e. On the axle c, in the space between the body e and cover h,

there is rigidly mounted a ratchet-wheel l, with which there engages a detent m, controlled by a spring n and pivoted to the body'e. The arrangement of this detent is such that the roller can only rotate for the forward motion of the skate, so that the latter can not travel backward.

The parts e and h, of which each roller consists are held together by the bushes d, located in the hangers b. At the heel-end of the skate is an arm or bracket o, which may be employed as brake-shoe.

' The skate is secured to the boot-heel by means of jaws p and p1, of which the latter can be adjusted by means of the screw-bolt q. The jaws r, rendered adjustable by means of the screw-bolts s, serve to fix the skate to the sole of the boot.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent oi the United States isz- 1. In a roller skate, in combination a roller-axle at tened at each end, a sole-plate presenting bearings to receive the axle ends; a hollow roller rotatably mounted on the axle, and open at one side; a cover loosely rotatable on the axle and closing the open side of the roller; means for connecting said cover to the said hollow roller, and means located within the roller for preventing rotation of the roller in a direction contrary to that of propulsion of the skater, substantially as described.`

2. In a roller skate, in combination, roller-axle flattened at each end; a sole plate presenting bearings to receive the axle ends; a hollow roll-er rotatably mounted on the axle, and open at one side, and presenting internal projections; a cover loosely rotatable on the axle and closing the open side of the roller, and having lugs engaging in the said projections; and means located within the roller for preventing rotation of the roller in a direction contrary to that of propulsion of the skater', substantially as described.

3. In a roller skate, in combination, a rollenaxle flattened at each end; a sole-plate presenting bearings to receive the axle ends, a hollow roller rotatably mounted on the axle, and open at one side, and presenting internal projections; a cover loosely rotatable on the axle, and

closing the open side of the roller, and having lugs engagi ing the said projections; a ratchet-wheel rigidly mounted on the axle, inside the roller; and .a spring-controlled detent pivoted to the roller and engaging the said ratchet; whereby the roller is prevented from turning in a direction contrary to that of propulsion ol the skater, substantially as described.

4. In a roller skate, in combination, roller-axles fiattened at each end; a sole-plate presenting hangers; bushes shaped to receive the axles and having` a rectangular portion ltting into the hangers; hollow rollers rotatably mounted on the axles and open at one side, and presenting internal projections; covers loosely rotatable on theaxles, and closingl the open side of the rollers, and having lugs engaging the said projections; ratchet-wheels rigidly mounted on the axles, inside the rollers, springcontrolled detcnts pivoted to the rollers and engaging the said ratchets; and a brake projectingvfrom the heel-end of the nsole-plate; substantially as described.

The foregoing specification signed at Annaberg this 1. day of December, 1905.

. PAUL GEORG PILZ.

In presence of- O'rroMAn Srnnxn, CHAS. BonNGnAnBnn. 

